• Maciej S. Szmigiero's avatar
    cgroup, docs: document the root cgroup behavior of cpu and io controllers · c4e0842b
    Maciej S. Szmigiero authored
    Currently, cgroups v2 documentation contains only a generic remark that
    "How resource consumption in the root cgroup is governed is up to each
    controller", which isn't really telling users much, who need to dig in the
    code and / or commit messages to learn the exact behavior.
    In cgroups v1 at least the blkio controller had its operation with respect
    to competition between child threads and child cgroups documented in
    blkio-controller.txt, with references to cfq-iosched.txt.
    Also, cgroups v2 documentation describes v1 behavior of both cpu and
    blkio controllers in an "Issues with v1" section.
    Let's document this behavior also for cgroups v2 to make life easier for
    Signed-off-by: default avatarMaciej S. Szmigiero <mail@maciej.szmigiero.name>
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>